Page 265 - Handbook of Properties of Textile and Technical Fibres

Tensile properties of cotton fibers: importance, research, and limitations 239

(a)
Total energy
Load
or total work
Loading
Unloading

Energy
or work
recovered
Extension
Elastic extension
(elastic strain)
Total extension
(b) 1
0.9 Elastic recovery = 0.1959 (stress) –0.499
0.8 r = 0.868
0.7
Elastic recovery 0.5
0.6

0.4
0.3
0.2
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6
Stress (cN/tex)
(c) 1.2
Elastic recovery = 1.076 (elongation) –0.548
1 r = 0.943
0.8
Elastic recovery 0.6

0.4

0.2
0
0 2 4 6 8 10
Strain (%)
Figure 7.7 Effect of stress and strain on elastic recovery. (a) Load versus extension; (b) Elastic
recovery versus stress; (c) Elastic recovery versus strain.
Relationship developed by Elmogahzy based on Meredith Data Meredith R: A comparison of
the tensile elasticity of some textile fibers, J Text Inst 36(7), 1945.